DAYTON, Ohio (01/23/2018) -- National Museum of the U.S. Air Force Restoration Specialist Casey Simmons installing propeller number one on the Boeing B-17F Memphis Belle™. Plans call for the aircraft to be placed on permanent public display in the WWII Gallery here at the National Museum of the U.S. Air Force on May 17, 2018. (U.S. Air Force photo by Ken LaRock)